Hiyori Kazane

Hiyori is a second-year student at Tomoki's school. She has feelings for Tomoki and joins the New World Discovery Club in order to get closer to him. In reality, Hiyori is an Angel who was first seen inside some sort of sleeping chamber when Sugata went to Synapse. The chamber connects her to her body on Earth, which functions like an avatar. Sugata was hesitant on letting her join his club since there are still a lot of things he does not know about what she really is. However, he welcomes her anyway, since her membership will allow his club to receive more funding. Thus far, nobody, except Sugata, Nymph, and Ikaros, is aware of Hiyori's true identity. Hiyori got rather embarrassed when it was suggested that she was dating Tomoki, suggesting that while she likes Tomoki, she has not even considered as far as dating him yet, and her presence becomes a source of major discomfort for Sohara, Nymph, and Astraea. This stems from the realization that Hiyori is always kind and caring to Tomoki, while the others seem to only see his "faults". Eventually, Hiyori manages to confess her feelings to Tomoki, which leaves him in shock as no girl has ever confessed to him before. However, her time with Tomoki was cut short when a careless truck driver ran her over, causing her body to disappear and her existence erased from everyone's memories (except the Angeloids and Tomoki).

Later on, Hiyori returns as a "Second-Generation Angeloid", Type Zeta" (第二世代エンジェロイドタイプζ（ゼータ）) armed with a khakkhara (monk staff) called Demeter (デメテル Demeteru), which has the power to control the weather, and has more sophisticated hacking abilities than Nymph. Her master was Nymph's previous master, the Man of Synapse, who turned her into an Angeloid so she could live her "dream" on Earth. Luckily, Hiyori was released from her master's control thanks to Nymph's evolved hacking abilities 'Aphrodite', allowing her to stay on Earth as a free Angeloid. Hiyori later drops out of the New World Discovery Club , since she already accomplished her goal of getting close to Tomoki (even going so far as kissing him). After the movie, or Hiyori arc, she keeps re-appearing as a minor character. Her re-appearances have little-to-nothing effects on the plot.

Abilities and Weapons
Hacking - A higher hacking level than Nymph.

Demeter - A powerful staff that grants the ability to control the weather. In the movie it controls time but it is not canon.

Relationships
Tomoki Sakurai - friend, the one she love while still dreaming

Chaos - In the same family of the Second-Generation Angeloids.

Man of Synapse - Former master.

Ikaros - Friend, classmate, fellow Angeloid.